There are four types of sentences used to present this information in a Social Story:
Descriptive sentences objectively address the “wh” questions: where the situation takes place, who is involved, what they are doing, and why they may be doing it.
Perspective sentences give a peek into the minds of those involved in the story; they provide details about the emotions and thoughts of others.
Directive sentences suggest desired responses tailored to the individual.
Control sentences are authored by the student himself as something of a mnemonic device -- a sentence to help him remember the story or deal with the situation. These are not used in every story and are typically used only with fairly high functioning children.
Stories
http://www.polyxo.com/socialstories/introduction.html#whatare
http://kansasasd.com/
http://www.thewatsoninstitute.org/teacher-resources2.jsp?pageId=2161392240601226415747290
http://www.freewebs.com/kidscandream/page12.htm